popViewControllerAnimated不会更新信息iPhone SDK

Question

当我尝试弹出一个视图控制器时,它不会更新上一个视图的信息.示例:我有一个单元格,在View1的标签中显示文本.单击单元格时,它转到View2(例如)当我在View2中选择一个选项时,popViewControllerAnimated用于返回View1,但是,我希望现在可以使用View1中的新选项更新标签.

我的困境是当我弹出View2时,View1中的标签不会更新.有任何想法吗？我试过添加[view1 reloadData]; 在视图弹出之前,但没有运气.

//VIEW1 the cell that displays the label.
    ringLabel = [[UILabel alloc] initWithFrame: CGRectMake(25, 12.7f, 250, 20)];
    ringLabel.adjustsFontSizeToFitWidth = YES;
    ringLabel.textColor = [UIColor blackColor];
    ringLabel.font = [UIFont systemFontOfSize:17.0];
    ringLabel.backgroundColor = [UIColor clearColor];
    ringLabel.textAlignment = UITextAlignmentLeft;
    ringLabel.tag = 0;
    ringLabel.text = [plistDict objectForKey:@"MYOPTION"];
    [ringLabel setEnabled:YES];
    [cell addSubview: ringLabel];
    [ringLabel release];


//VIEW2 when cell clicked 
    CustomProfileViewController *cpvc = [CustomProfileViewController alloc];
    cpvc.ringtone = [ringList objectAtIndex:indexPath.row];
    [cpvc.tblCustomTable reloadData];
    [self.navigationController popViewControllerAnimated:YES];

Answer 1

您将要覆盖-viewWillAppear:第一个视图控制器并在那里更新标签.(一定要打电话super).

例:

- (void)viewWillAppear:(BOOL)animated {
    // This method is called whenever the view is going to appear onscreen.
    // (this includes the first time it appears.)
    ringLabel.text = [plistDict objectForKey:@"MYOPTION"];
    [super viewWillAppear:animated];
}